ask them to teach the kids in your school about personal privacy protection. With this lesson will come (if done correctly) lessons on setting up proxies. The argument to use is that monitoring and censoring you will only teach children that it's okay to be monitored and censored. Giving them the tools to protect their privacy and ways to work around site/port blocking, is going to be always more important. On the down side, as you get better at avoiding this stuff, your school admins and everyone else, will also get better at imposing their restrictions on you.